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首页> 外文期刊>Tribology International >Optimizing the tribological performance of textured piston ring-liner contact for reduced frictional losses in SI engine: Warm operating conditions
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Optimizing the tribological performance of textured piston ring-liner contact for reduced frictional losses in SI engine: Warm operating conditions

机译：优化带纹理的活塞环-缸套接触的摩擦学性能，以减少SI发动机的摩擦损失：温暖的工作条件

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摘要

Development in surface modifications has shown promising outcomes in improving the tribological performance of contacts in hydrodynamic, mixed, and boundary lubrications. Piston ring-liner (PRL) interaction is one type of such contact Under dynamic loading and extreme operating conditions, PRL conjunction accounts for a substantial portion of the total parasitic losses in IC engines. In this work the mixed lubrication model and realistic oil rheology are considered in order to evaluate and optimize the tribo-characteristics of partially textured barrel-shaped piston ring operating under real engine conditions. Surface texture patterns with varying shapes and orientations are considered and individually optimized to minimize energy loss. Thereafter, the performances of optimized texture patterns are compared. Optimized geometrical parameters for different rings with varying degrees of conformity with cylinder liner are also evaluated. Grooves normal to the sliding direction were found to be the top performer in the hydrodynamic regime, whereas micro dimples perform better at piston reversals. Thus, micro-dimples resulting from the intersection of orthogonal grooves are also studied. Results show encouraging improvements in frictional behavior. (C) 2016 Elsevier Ltd. All rights reserved.
机译：表面改性的发展已显示出在改善流体动力润滑，混合润滑和边界润滑中接触件的摩擦学性能方面有希望的结果。活塞环-衬套（PRL）相互作用是这种接触的一种类型。在动态负载和极端运行条件下，PRL联轴器占IC发动机总寄生损耗的很大一部分。在这项工作中，考虑了混合润滑模型和现实的油流变性，以便评估和优化在实际发动机工况下运行的部分织纹的桶形活塞环的摩擦特性。考虑改变形状和方向的表面纹理图案，并分别进行优化以最大程度地减少能量损失。此后，比较优化纹理图案的性能。还评估了不同环与气缸套的符合程度不同的优化几何参数。发现垂直于滑动方向的凹槽在流体力学方面是性能最高的，而微型酒窝在活塞反转时表现更好。因此，还研究了由正交凹槽的相交产生的微凹痕。结果表明，摩擦性能得到了令人鼓舞的改善。 （C）2016 Elsevier Ltd.保留所有权利。

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